mirror of
https://github.com/mozilla/gecko-dev.git
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284 lines
8.4 KiB
C++
284 lines
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "CheckQuotaHelper.h"
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#include "nsIDOMWindow.h"
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#include "nsIObserverService.h"
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#include "nsIPermissionManager.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsIURI.h"
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#include "nsPIDOMWindow.h"
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#include "mozilla/dom/quota/QuotaManager.h"
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#include "mozilla/Services.h"
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#include "nsContentUtils.h"
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#include "nsNetUtil.h"
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#include "nsThreadUtils.h"
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#include "nsXULAppAPI.h"
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#define TOPIC_QUOTA_PROMPT "indexedDB-quota-prompt"
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#define TOPIC_QUOTA_RESPONSE "indexedDB-quota-response"
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#define TOPIC_QUOTA_CANCEL "indexedDB-quota-cancel"
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USING_QUOTA_NAMESPACE
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using namespace mozilla::services;
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using mozilla::MutexAutoLock;
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namespace {
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inline
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uint32_t
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GetQuotaPermissionFromWindow(nsIDOMWindow* aWindow)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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nsCOMPtr<nsIScriptObjectPrincipal> sop(do_QueryInterface(aWindow));
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NS_ENSURE_TRUE(sop, nsIPermissionManager::DENY_ACTION);
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return CheckQuotaHelper::GetQuotaPermission(sop->GetPrincipal());
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}
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} // anonymous namespace
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CheckQuotaHelper::CheckQuotaHelper(nsPIDOMWindow* aWindow,
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mozilla::Mutex& aMutex)
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: mWindow(aWindow),
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mMutex(aMutex),
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mCondVar(mMutex, "CheckQuotaHelper::mCondVar"),
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mPromptResult(0),
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mWaiting(true),
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mHasPrompted(false)
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{
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NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
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mMutex.AssertCurrentThreadOwns();
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}
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bool
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CheckQuotaHelper::PromptAndReturnQuotaIsDisabled()
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{
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NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
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mMutex.AssertCurrentThreadOwns();
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while (mWaiting) {
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mCondVar.Wait();
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}
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NS_ASSERTION(!mWindow, "This should always be null here!");
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NS_ASSERTION(mPromptResult == nsIPermissionManager::ALLOW_ACTION ||
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mPromptResult == nsIPermissionManager::DENY_ACTION ||
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mPromptResult == nsIPermissionManager::UNKNOWN_ACTION,
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"Unknown permission!");
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return mPromptResult == nsIPermissionManager::ALLOW_ACTION;
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}
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void
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CheckQuotaHelper::Cancel()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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mMutex.AssertCurrentThreadOwns();
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if (mWaiting && !mHasPrompted) {
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MutexAutoUnlock unlock(mMutex);
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// First close any prompts that are open for this window.
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nsCOMPtr<nsIObserverService> obs = GetObserverService();
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NS_WARN_IF_FALSE(obs, "Failed to get observer service!");
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if (obs && NS_FAILED(obs->NotifyObservers(static_cast<nsIRunnable*>(this),
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TOPIC_QUOTA_CANCEL, nullptr))) {
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NS_WARNING("Failed to notify observers!");
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}
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// If that didn't trigger an Observe callback (maybe the window had already
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// died?) then go ahead and do it manually.
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if (!mHasPrompted) {
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nsAutoString response;
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response.AppendInt(nsIPermissionManager::UNKNOWN_ACTION);
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if (NS_SUCCEEDED(Observe(nullptr, TOPIC_QUOTA_RESPONSE, response.get()))) {
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NS_ASSERTION(mHasPrompted, "Should have set this in Observe!");
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}
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else {
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NS_WARNING("Failed to notify!");
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}
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}
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}
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}
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// static
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uint32_t
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CheckQuotaHelper::GetQuotaPermission(nsIPrincipal* aPrincipal)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(aPrincipal, "Null principal!");
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NS_ASSERTION(!nsContentUtils::IsSystemPrincipal(aPrincipal),
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"Chrome windows shouldn't track quota!");
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nsCOMPtr<nsIPermissionManager> pm =
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do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
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NS_ENSURE_TRUE(pm, nsIPermissionManager::DENY_ACTION);
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uint32_t permission;
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nsresult rv = pm->TestPermissionFromPrincipal(aPrincipal,
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PERMISSION_STORAGE_UNLIMITED,
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&permission);
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NS_ENSURE_SUCCESS(rv, nsIPermissionManager::DENY_ACTION);
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return permission;
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}
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NS_IMPL_ISUPPORTS3(CheckQuotaHelper, nsIRunnable,
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nsIInterfaceRequestor,
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nsIObserver)
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NS_IMETHODIMP
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CheckQuotaHelper::Run()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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nsresult rv = NS_OK;
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if (NS_SUCCEEDED(rv)) {
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if (!mHasPrompted) {
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mPromptResult = GetQuotaPermissionFromWindow(mWindow);
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}
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if (mHasPrompted) {
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// Add permissions to the database, but only if we are in the parent
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// process (if we are in the child process, we have already
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// set the permission when the prompt was shown in the parent, as
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// we cannot set the permission from the child).
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if (mPromptResult != nsIPermissionManager::UNKNOWN_ACTION &&
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XRE_GetProcessType() == GeckoProcessType_Default) {
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nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(mWindow);
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NS_ENSURE_TRUE(sop, NS_ERROR_FAILURE);
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nsCOMPtr<nsIPermissionManager> permissionManager =
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do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
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NS_ENSURE_STATE(permissionManager);
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rv = permissionManager->AddFromPrincipal(sop->GetPrincipal(),
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PERMISSION_STORAGE_UNLIMITED,
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mPromptResult,
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nsIPermissionManager::EXPIRE_NEVER, 0);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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}
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else if (mPromptResult == nsIPermissionManager::UNKNOWN_ACTION) {
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uint32_t quota = QuotaManager::GetStorageQuotaMB();
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nsString quotaString;
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quotaString.AppendInt(quota);
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nsCOMPtr<nsIObserverService> obs = GetObserverService();
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NS_ENSURE_STATE(obs);
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// We have to watch to make sure that the window doesn't go away without
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// responding to us. Otherwise our database threads will hang.
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rv = obs->AddObserver(this, DOM_WINDOW_DESTROYED_TOPIC, false);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = obs->NotifyObservers(static_cast<nsIRunnable*>(this),
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TOPIC_QUOTA_PROMPT, quotaString.get());
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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}
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MutexAutoLock lock(mMutex);
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NS_ASSERTION(mWaiting, "Huh?!");
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// This should never be used again.
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mWindow = nullptr;
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mWaiting = false;
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mCondVar.NotifyAll();
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return NS_OK;
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}
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NS_IMETHODIMP
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CheckQuotaHelper::GetInterface(const nsIID& aIID,
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void** aResult)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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if (aIID.Equals(NS_GET_IID(nsIObserver))) {
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return QueryInterface(aIID, aResult);
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}
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if (aIID.Equals(NS_GET_IID(nsIDOMWindow))) {
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return mWindow->QueryInterface(aIID, aResult);
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}
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*aResult = nullptr;
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return NS_ERROR_NOT_AVAILABLE;
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}
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NS_IMETHODIMP
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CheckQuotaHelper::Observe(nsISupports* aSubject,
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const char* aTopic,
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const char16_t* aData)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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nsresult rv;
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if (!strcmp(aTopic, TOPIC_QUOTA_RESPONSE)) {
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if (!mHasPrompted) {
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mHasPrompted = true;
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mPromptResult = nsDependentString(aData).ToInteger(&rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = NS_DispatchToCurrentThread(this);
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NS_ENSURE_SUCCESS(rv, rv);
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// We no longer care about the window here.
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nsCOMPtr<nsIObserverService> obs = GetObserverService();
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NS_ENSURE_STATE(obs);
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rv = obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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if (!strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC)) {
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NS_ASSERTION(!mHasPrompted, "Should have removed observer before now!");
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NS_ASSERTION(mWindow, "This should never be null!");
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nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(aSubject));
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NS_ENSURE_STATE(window);
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if (mWindow->GetSerial() == window->GetSerial()) {
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// This is our window, dying, without responding to our prompt! Fake one.
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mHasPrompted = true;
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mPromptResult = nsIPermissionManager::UNKNOWN_ACTION;
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rv = NS_DispatchToCurrentThread(this);
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NS_ENSURE_SUCCESS(rv, rv);
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// We no longer care about the window here.
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nsCOMPtr<nsIObserverService> obs = GetObserverService();
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NS_ENSURE_STATE(obs);
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rv = obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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NS_NOTREACHED("Unexpected topic!");
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return NS_ERROR_UNEXPECTED;
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}
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